Typewriting machine



G. G. GOING TYPEWRITING MACHINE .2 Sheets-Sheet 1 Original Filed March21. 1921 MQM/ / EINYENTOR AQQU' Z A-TTORNEY 3,471,153 G. G. someTYPEWRITING MACHINE Original Filed March 21. 1921 2 Sheets-Sheet 2WWW/Ill.

' v ATTORNEY Patented Oct. 16, 1923.

UNITED STATES.

PATENT OFFICE.

GEORGE GOULD GOING, OF MIDDLETOWN, CONNECTICUT, ASSIGNOR, BY MESNEASSIGN- MENTS, TO THE NOISELESS TYPEWRITER COMPANY, INC., A CORPORATIONOF DELAWARE.

'IYPEWRITING MACHINE.

Application filed March 21, 1921, Serial No. 453,983. Renewed March31,1923.

T 0 all whom it may concern Be it known that I, GEORGE GOULD GOING,acitizen of the United States, residing at Middletown, in the county ofMiddlesex and State of Connecticut, have invented certain new and usefulImprovements in Typewriting Machines, of which the fol lowing is a full,clear, and exact description, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to typewriting machines and more particularly toan improved type action comprising a swinging type bar and depressiblekey lever and connecting and associated parts to effect printing.

It is an object of the invention to provide simple, compact andeflicient mechanism of the character stated.

It is a further object to provide an improved type action capable ofeasy and rapid operation and adapted to effect printing substantiallywithout noise.

Another object is to provide an improved type action for small andreadily port-able machines wherein the parts are capable of relativelycheap manufacture and assembly and which possesses features ofstructural superiority and functional advantage.

Other object'sand advantages will be in part noted hereinafter inconnection with the following description of the accompanying drawings,which illustrate a typical but preferred embodiment of the invention andwherein.

Figure 1 represents a side view of the improved type action -.withthesupporting parts in section and certain of the associated parts in fulllines;

Figure 2 is a similar view of the type action in the positioncorresponding to the depressed position of the key lever; and

Fig. 3 is a similar View of the type action in printing position.

In general, the type writing machine includes a base frame 1, having acarriage 2 mounted to travel transversely across the rear part andprovided with a platen 3 about which the paper is rolled and which actsas a backing as the type character are impressed thereagainst. The typeaction includes a depressible key lever 4, pivotally mounted at its rearend 5 and guided vertically at its fore end in a slotted bar 6, and atype bar 7 pivotally mounted intermediate its end but adjacent its lowerend at 8 and carrying at its upper or free swinging end the typecharacter head 9. The key lever is connected to the type bar by a link10 of inverted U-shape, pivotally supported at 11 on an upstanding plate12 and provided with an off set 15 at its other end disposed below andnormally held against the lower edge 16 of the key lever and pivoted at13 to a horizontal link 14 in turn pivoted at 17 to a lower end of thetype bar.

As an associated part of the actuating mechanism for the type bar thereis pro vided an element 18 having an enlarged or weighted end 19 acting,as will be described,

to store energy during the initial depreshaving a fixed pivotal axis ofmotion on the stationary bracket plate 27 at the upper end 28 and havinga pivotal connection at 29 with a link 30, which latter is pivotallyconnected at 31 to the type bar 7 at the rear of the type head 9. Thevarious movable parts of the type action are normally maintained inretracted position, as shown in Figure 1, through the medium of a platespring 32 acting to elevate the key lever 4, and a coil spring 33stretched between a fixed part 34 of the stationary bracket 27 and theshort arm 23 of the bell crank 21.

Depression of the key lever 4 (Fig. 2) causes a direct forcetransmission through links 10 and 14 to the type bar 7, swinging theupper end of the latter rapidly towards means 19. The latter, continuingits swinging movement, acts to extend the links 26 and 30 into alignedparallelism whereby said links constitute, in effect, an extendedtoggle, and the leverage of the energy-storing means on this toggle isfurther augmented by an extension into aligned parallelism of the linkportion of the element '18 with the long arm of the bell crank 21 toconstitute in effect a second toggle, as shown in Figure 3. i That is,the printing stroke of the type bar is silently limited by the extensionof links 26 and 30, bringing the pivotal points 28, 29 and 31 into lineand the extension mentioned, which transmits a powerful pressing forceon the type head 9, also brings the pivotal points 22, and into line toprevent overtial accelerated throw of the links 26 and 30. As shown inFigure 3, also, the bell crank 21 is arrested at this point byengagement of the short arm 23 thereof against the stop 24, the reactingbound there-between coupled with the pull of spring 33 acting to eflectimmediate and rapid withdrawal of the type bar from printing position "0the normal retracted position, as shown in Figure 1. The stroke of thetype bar under the force of the weight 19- is permitted by the looseengagement of the oft-set 15 on link 10 and the edge 16 of the keylever, these parts moving out of contact, as shown in Fi re 3.

n practice, the platen 3 may have a hard surfacing such as steel, notsubject to noticeable wear. The type bar connections. furthermore, arecapable of easy fore and aft adjustment, since the link 26, the bellcrank 21 and the type bar 7 are all pivotally sup ported on the platebracket 27, which latter is adjustably held on the angle bar 35 by. for.

example, an adjusting screw 36 and a lockin screw 37. In practice, also,the universa bar 38 isarranged for contact and actuation by the heel 39of the type bar at its lower end.

In operation, a finger stroke on the key lever 4 effects a very rapidtransposition of the parts to the position shown in Figure 2, thereaftermovement of the type bar 7 isabruptly decelerated without, however, adistinct stoppage. This results from the inimovement of the weight 19and the sudden assumption thereby of the force to transmit the type barat the point 31 instead of the earlier transmission of force from thekey lever to the type bar at the point 17. In addition, the speed of thetype bar during the final portion of its stroke is decelerated and theforce of its movement is augmented by the contemporaneous approach toextension of the toggle links 26 and 30, and the alignment of the longarm of the bell crank 21 with the connecting portion of the element 18,that is, the alignment of the pivotal points 20, 25 and 22. Speaking interms of result, therefore, the type action described operates to causean initial quick transposition of the type'bar from retracted positionto adjacent the platen un-- without noisy impact against the paper andwith power to print by pressure. Furthermore, the protracted limit ofthe type bar is controlled through the links 26 and 30 substantiallyindependently of the platen 3 and surplus energy of the parts, if any,is noiselessly absorbed through the cushioned engagement of the stop 24and short arm 23 of the bell crank.

It will be understood that the key levers may be conventionally arrangedin series of parallel rows and the fore ends thereof disposed toconstitute the ordinary standard keyboard, and that the type bars 7 maybe arranged in an are about the printing point,

all of the respective supporting bracket plates 27 being independentlyadjustable on the segment plate 35. There may also be associated in themachine the Well-understood additional mechanism such as the escapement,the shift for printing in different cases, the back spacer, the marginalrelease, ribbon reverse, etc.

The present action is susceptible of embodiment in relatively smallsize. The parts are, furthermore, of substantial and rigid construction,not likely to get out of order, capable of easy adjustment and, moreespecially, operative to effect clearly defined character printingsubstantially silently. It will be understood. also, that the presentinvention is susceptible of embodiment in forms other than thatspecifically shown herein, without sacrifice of the major advantagesherein indicated, and resident in the improved mechanism.

Having described my invention, what I claim is new and desire to secureby Letters Patent is;

1. In a typewriting-machine in combination, a. platen, a key lever, a.pivoted type bar, operative connecting means between said key lever andsaid type bar to eiiect initial movement of the. latter on its stroketoward said platen. a sub-lever pivoted to swing about a fixed axisofmotion, an element pivotally connected to said sub-lever, and operativeconnections between said element and said type bar adjacent the typehead of the latter, said connections efiecting a storage of energy insaid element during the movement of said type bar as propelled by saidkey lever and an expenditure of said stored energy thereafter tocomplete the printing stroke of said type bar.

2. In a t-ypewriting machine in combination, a platen, a depressible keylever. a pivoted type bar, operative connecting means-between said leverand said bar to effect the movement of the latter upon initialdepression of the former and to permit continued movement of the latterindependently of the former, means to acquire and store energy upon saidinitial movement of said type bar and to expend such energy thereafterto complete the printing stroke of said type bar, and means adjustabletowards and from said platen to sup-port said type bar and said energystoring and expending means.

.3. In a typewriting machine in combination, aplaten, a depressiblekeylever, a pivoted type bar. operative connecting means between saidlever and said bar to start the latter towards said platen on depressionof the former, a stop to arrest depression of said lever prior to thefinal movement of said bar, said connecting means including separableparts to permit continued movement of said'bar after arrest of saidlever, means independent of said connecting means to store energy duringthe initial movement of said bar by said lever. said last-mentionedmeans being associated with said bar to expend its stored energy ineffecting a final printing movement of said bar, and a common meansadjustable towards and from the platen to support said bar and saidenergy storing and expending means.

4. In a typewriting machine. in combination, a platen, a depressible keylever, a pivoted type bar, an operative connection between said keylever and said type bar to effect initial movement of the latter and Ito permit continued movement thereof after arrest of the former, a stopto limit depression of said key lever, a pair of pivotally connectedlinks, one connected to a rigid part and the other to said type baradjacent the type head to limit the printing stroke of sai type barsubstantial y independently of said platen, means connected ;to one ofsaid links to store energy durnection at the other end to said means forstoring and expending energy.

5. In a typewriting machine in combination, a supporting plate, aswinging type bar pivotally mounted thereon at one end, a pair ofpivotally connected links, one being pivotally connected to said typebar and the other pivotally connected to said supporting gate at theother end, and means where y the fore and aft position of said plate maybe adjusted.

6. In a typewriting machine in sub-combination, a supporting plate, aswinging type bar pivotally mounted thereon at one end, a link pivotallyconnected to said type bar at its other end, a second link pivotallyconnected to said plate at its other end, said links being pivotallyconnected together, a swinging weighted sub-lever pivotally connected toone of said links, a second sub-lever pivotally connected to said plateand to said weighted sub-lever, and means to permit fore and aftadjustment of said plate.

In testimony whereof I affix my signature, in the presence of twowitnesses.

GEORGE GOULD GOING.

